Leases - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Jan. 01, 2019
Lessee, Lease, Description [Line Items]
Operating lease right-of-use assets	$ 46.8	$ 48.0
Operating lease, liability	49.1	51.1
Rent expense			$ 17.2
Operating leases not yet commenced	0.9
Lease income	$ 3.3	$ 7.5
Lease income			$ 6.4
Minimum
Lessee, Lease, Description [Line Items]
Lease renewal options range (years)	1 year
Maximum
Lessee, Lease, Description [Line Items]
Lease renewal options range (years)	20 years
Operating lease term (years)	2 years
Accounting Standards Update 2016-02
Lessee, Lease, Description [Line Items]
Operating lease right-of-use assets				$ 51.7
Operating lease, liability				$ 56.3